ἧχι
From LSJ
τοῖς οἰκείοις βουλεύμασιν ἁλίσκεσθαι → hoist by one's own petard, hoist with one's own petard, hoist on one's own petard, hoisted by one's own petard, be hoist with one's own petard
English (LSJ)
(not ᾗχι), Ep. for ᾗ, Adv.
A where, Il.1.607, Call.Ap.91, etc.; ἧχί περ, D.P.176,258; ἧχί τε Id.67.
German (Pape)
[Seite 1180] auch ᾗχι geschrieben, p. = ᾗ, wo, Hom.
Greek (Liddell-Scott)
ἧχι: (οὐχὶ ᾗχι Ἡρῳδιαν. 1, 505), Ἐπ. ἀντὶ ᾗ, ἐπίρρ., ὅπου, Ὅμ. ἧχί περ, ἧχί τε Διον. Π.